What is CVE-2024-55599?
An Improperly Implemented Security Check for Standard vulnerability [CWE-358] in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions may allow a remote unauthenticated user to bypass the DNS filter via Apple devices.
The record classifies CVE-2024-55599 under weakness class CWE-358. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 473 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 4.9 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:X/RC:X - EPSS (FIRST)
- 0.3% probability of exploitation in the next 30 days, higher than 32.1% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-07-08, last modified 2026-08-11
Is CVE-2024-55599 being exploited?
It currently carries a trending score of 13 in the Threadlinqs vulnerability feed.
Affected products and versions
- Fortinet: FortiOS, FortiProxy
How to fix CVE-2024-55599
No vendor patch reference has been recorded for CVE-2024-55599 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2024-55599
1 tracked threat in the Threadlinqs corpus references CVE-2024-55599, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .